MySQL--修改MySQL账号密码

##使用mysqladmin进行修改
mysqladmin -u username -h hostname password 'new password';

##使用set命令进行修改
SET PASSWORD FOR 'username'@'host' =PASSWORD('new password')

##使用update命令进行修改
##MySQL 5.7版本：

UPDATE mysql.user
SET authentication_string=PASSWORD('abc@123')
WHERE user='root';
FLUSH PRIVILEGES;

##MySQL 5.6版本：
UPDATE mysql.user
SET password=PASSWORD('abc@123')
WHERE user='root';
FLUSH PRIVILEGES;

## 使用GRANT+明文密码
GRANT USAGE ON *.* TO 'gga2'@'localhost' IDENTIFIED BY '123@456';

## 使用GRANT+密文密码
SELECT PASSWORD('123@456');
GRANT USAGE ON *.* TO 'gga3'@'localhost' IDENTIFIED BY PASSWORD '*864CE19166BD4846244E41F8EA56377F18C3EFAA';